Horner is no more relaiable
I don't know why u say that, I didn't see any better/more accurate writing of new testament so far than his
of course the website of coptic manuscripts is nice to see, but there isn't much to read
the other page SAH_BOH is very useful and the text is used in a website called unbound bible
http://unbound.biola.edu/index.cfm?method=unbound.welcomebut in addition to the mistakes mentioned in the same web page, there is a bigger mistakes like
(Qenpiiordanh sniaro) ϧⲉⲛ ⲡⲓⲓⲟⲣⲇⲁⲛⲏ ⲥⲛⲓⲁⲣⲟ instead of ϧⲉⲛ ⲡⲓⲓⲟⲣⲇⲁⲛⲏⲥ ⲛⲓⲁⲣⲟ
and sometimes I found even spelling mistakes, unfortunately I didn't write them down
for the apocrypha I liked the ones with interlinear translation
http://www.metalog.org/ was my source but its down now
and thanks for the last link, this one is rich with manuscripts